作业帮求高人解英文的三角函数题!
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/24 06:19:48
求高人解英文的三角函数题!
A fence post is located 54 feet from one corner of a building and 39 feet from the adjacent corner.Fences are put up between the post and the building corners to form a triangular garden area.The 39-foot fence makes a 54° angle with the building.How long is the building wall?
A fence post is located 54 feet from one corner of a building and 39 feet from the adjacent corner.Fences are put up between the post and the building corners to form a triangular garden area.The 39-foot fence makes a 54° angle with the building.How long is the building wall?
x^2+39^2-2*39cos54°=55^2
x约等于68feet
x约等于68feet